If you use a air compresser for anything don't use P.V.C. pipe for compressed air...This is a timebomb waiting to "explode" on you and many bowyers and farmers,welders and many here have it I'm sure and used it for years...I was told by a very good friend that I bought pipe from at a plumbing supply house to "NEVER" and I repeat "NEVER" use P.V.C. plastic pipe for air compressors...I have a brother that has it in his machine shop and he's smart as heck but when I told him about the possibility's of it exploding he just didn't care...I sure would hate to see a kid or anybody get hurt by some know it all that use's it and claims it has it written on the pipe it can handle 480 p.s.i. and I say that's water pressure not Air pressure and these guys argue till there's no end...
Now I myself ain't no expert on that but just forwarning incase you decide to run P.V.C. as your main line feeding air to a machine or having a airhose handy at each station of your equipment...
My friend worked at several plumbing supply houses as a manager and has told me there is a bunch of guys coming in asking for adapters,pipe etc to run air lines and his job was to tell them this cause they had a safely class on it telling them not to use it for air and if I ain't mistaken he didn't sell them any when they told him what they intended to use it for...
Now galvanized pipe is a different story and you can use it for a main run...
Don't say I didn't warn you...